WorldCat Identities
Fri Mar 21 17:09:32 2014 UTClccn-n871284070.73Geomorphic documentation of the Missouri River reach between Nebraska City and Omaha, Nebraska: RM562 - RM612 /0.911.00An illustrated guide for monitoring and protecting bridge waterways against scour /26114311n 871284071943155lccn-n80086308Iowa Institute of Hydraulic Researchlccn-n87106827Ettema, R.edtlccn-n80071212Kennedy, J. F.(John Fisher)1933-orglccn-no2005026291Toda, Keiichilccn-n81014058Cold Regions Research and Engineering Laboratory (U.S.)viaf-240937803Locher, Frederick A.lccn-n50030602Glover, John R.lccn-n81095723United StatesArmyCorps of EngineersRock Island Districtlccn-n87123439Vadnal, John Louisorglccn-n80081769Stanley ConsultantsNakato, TatsuakiConference proceedingsIce prevention and controlSuspended sedimentsHydraulic structures--Ice preventionOptical instrumentsParticlesRiver engineeringHydraulic engineeringHydraulicsSediment transportMississippi RiverComputer simulationPumping stations--ModelsRiver channels--Mathematical modelsSediment transport--Mathematical modelsWatershedsHydraulic modelsIntakes (Hydraulic engineering)IllinoisMissouri RiverNuclear power plantsDamsArkansas--Chicot CountyPumping stationsPumping machineryLocks (Hydraulic engineering)--Cold weather conditionsDams--Cold weather conditionsIowaWater wavesScour at bridgesRiver sedimentsRiver channelsArkansasStilling basins--ModelsCalifornia--Pit RiverSpillways--ModelsPacific Gas and Electric Company19741976197719781979198119831984198519871988198919901991199219941996199719981999200320065035496627TC203ocn011065684ocn614071456ocn452770555ocn657957369957ocn027905583book19920.93Nakato, TatsuakiUnconventional energy sources for ice control at lock and dam installationsOperation of lock and dam installations is made troublesome and hazardous by ice growth along lock walls and by freezing of gates to ice covers. Since considerable amounts of power are required for ice control, lock operators are interested in utilizing economical power sources other than that generated by commercial utilities. This study attempted to determine the feasibilities of using several unconventional power sources for ice control at navigation locks and dams. Considered were sensible heat from groundwater, solar power, wind power and portable hydroelectric sources. Only portable hydroelectric power is feasible. Groundwater is at best of marginal feasibility, and solar and wind power sources are unreliable835ocn002326550book19740.93Locher, Frederick AInvestigation of the operating characteristics of the Iowa sediment concentration measuring systemThis report presents results of an investigation conducted to evaluate the capabilities and limitations of the Iowa Sediment Concentration Measuring System (ISCMS). The manner in which the ISCMS responds to a group of particles and to a single particle is presented. Specifically, problems with non-uniformities in the transducer field and problems created by inadequate frequency response are discussed. The results of tests conducted in an oscillatory flow facility are evaluated and the use of the ISCMS for measuring the instantaneous suspended sediment concentration is reviewed. Recommendations for improvement of the instrument are also suggested573ocn036487085book19960.90Issues and directions in hydraulics : proceedings of an Iowa hydraulics colloquium, Iowa City, Iowa, USA, 22-24 May 1995Conference proceedings263ocn008472274book19810.88Nakato, TatsuakiField study and tests of several one-dimensional sediment-transport computer models for Pool 20, Mississippi RiverTo test the applicability of various one-dimensional sediment-transport numerical models of movable-bed channels to Pool 20 to the Mississippi River, detailed field data were first collected, and several numerical models were subsequently evaluated using these field data. Chapter I describes the detailed results from a sediment sampling field study conducted in 1978 near Buzzard Island (RM 347-55) in Pool 20 of the Mississippi River. Variations in the longitudinal and transverse distributions are presented for various flow quantities and sediment characteristics, and are analyzed in connection with the prevalent shoaling problem in the Buzzard Island study reach. Chapter II evaluates the performance of four mathematical simulation models which used the data from a complimentary field study conducted in 1976 to establish the initial conditions when predicting the 1978 conditions. The four models evaluated were: (1) the HEC-6 model provided by the Hydrologic Engineering Center, U.S. Army Corps of Engineers; (2) the SUSR; (3) UUWSR models employed at the Colorado State University; and (4) the CHAR2 model used by the Sogreah consulting firm in Grenoble, France. (Author)244ocn011065684book19830.92Nakato, TatsuakiA numerical model for flow and sediment transport in alluvial-river bendsClosed-form mathematical models are formulated for the rate of development and strength of secondary current, and for bed topography in meandering, erodible-bed streams of arbitary plan form. The formulations utilize conservation of flux-of-moment-of momentum as the additional relation required to complete the formulation for the radial bed-shear stress. The secondary-flow-velocity calculation was uncoupled from the calculation of the radial mass-shift velocity and streamwise velocity distributions, which were obtained from the depth-integrated equations expressing conservation of mass and streamwise momentum. Numerical simulations were made for one laboratory flow and two Sacramento River flows with constant centerline curvature. Good agreement was obtained between measured and computed distributions of flow and depth-averaged streamwise velocity. (Author)223ocn003424341book19770.92Nakato, TatsuakiField study of sediment transport characteristics of the Mississippi River near Fox Island (RM-355-6) and Buzzard Island (RM-349-50)The field study was conducted in order to obtain a better understanding of the flow and sediment-transport mechanisms responsible for the recurrent shoaling that has been experienced in the vicinities of Fox Island (RM-355-6)and Buzzard Island (RM-349-50) in Pool 20 between Keokuk, Iowa, and Canton, Missouri, in the Mississippi River. Three sets of detailed data on transverse and streamwise distributions of flow velocity, suspended sediment discharge, bed-load discharge, bed-material properties, and flow depth were obtained for the high, intermediate, and low river stages during the period between May and September, 1976. The field data were used to establish empirical relationships between the sediment transport rates and hydraulic quantities in the study reaches. Based on the empirical sediment discharge formulas, closures of some side-channels to increase-transport capacity in the main channel of the study reaches have been suggested. (Author)226ocn005306073book19770.88Nakato, TatsuakiDetailed model study of pump-approach flows for the Lake Chicot pumping plantA 1:24 Froude-scale model of the proposed Lake Chicot Pumping Station was constructed and utilized to identify and to correct hydraulically objectionable features of the flows in the pump sumps. The model tests showed that the flows from the plant forebay generally enter the individual pump bays with a strong transverse component of velocity and produce an intense captive eddy on the lee side of each pump-bay partition wall. The transverse velocity resulted from geometric constraints imposed on the plant configuration. In order to achieve better pump approach-flow conditions trash racks with relatively deep vertical bars which functioned as turning vanes were proposed. A 1:10-scale sump model then was built to test for model-scale effects in the trash-rack tests, and an extensive study was conducted to obtain an improved sump configuration which would minimize any vortex-related problems in and around pump suction bells. The modified sump configuration has small clearance between the pump bell and sump back-wall; converging sidewalls; and a floor mounted splitter plate (vortex breaker) beneath the pump. (Author)203ocn004865633book19780.90Nakato, TatsuakiAssessment of available field sedimentation data for GREAT-II watershedAn inventory study concerning available stream sedimentation and flow data for the GREAT II (Great River Environmental Action Team II) watershed was conducted for the Sediment and Erosion Work Group of GREAT II. The study area covered the Upper Mississippi River and its tributaries between Guttenberg, IA, and Saverton, MO. These data were utilized to obtain rough estimates of annual sediment yields at individual sediment sampling stations by simple correlating monthly averaged suspended-sediment discharges with monthly averaged stream discharges. Based on these estimates, major sediment source areas were identified, and recommendations regarding installation of new sediment sampling stations for further baseline data were made. A review of some existing methodologies in estimating sediment yields also was made, and a plan of study to determine quantities of sediment delivered by tributary sources into the Mississippi River was proposed. (Author)205ocn005930702book19790.95Nakato, TatsuakiModel tests of the proposed intake structure of the Quad-Cities nuclear power plant152ocn010271715book19810.90Nakato, TatsuakiSediment-budget study for the upper Mississippi River, GREAT-II reach132ocn006246338book19760.84Nakato, TatsuakiModel study of the Lake Chicot Pumping Plant122ocn011461758book19840.88Nakato, TatsuakiModel investigation of intake-shoaling and pump-vibration problems : Iowa Generation Council Bluffs Unit 3 circulating-water intake61ocn003217764book19770.81Wave entrainment of sediment from rippled beds61ocn070117369book20061.00Ettema, RAn illustrated guide for monitoring and protecting bridge waterways against scour51ocn019522404book19870.73Nakato, TatsuakiGeomorphic documentation of the Missouri River reach between Nebraska City and Omaha, Nebraska: RM562 - RM61242ocn034112103book19941.00Nakato, TatsuakiHydraulic model study of stilling basin floor blocks : Pacific Gas and Electric Company's Pit 6 Dam41ocn029263234book19920.92Nakato, TatsuakiA preliminary hydraulic model study : Arkansas Electric Cooperative Corporation's Dam No. 2 hydropower project on the Arkansas River42ocn020368471book19880.73Nakato, TatsuakiHydraulic-laboratory model studies of the circulating-water pump-intake structure, Florida Power Corporation, Crystal River Units 4 and 542ocn023820406book19900.73Nakato, TatsuakiHydraulic model studies of circulating-water ocean-intake velocity caps : Florida Power & Light Company's St. Lucie Power Plant42ocn023820431book19900.81Nakato, TatsuakiA hydraulic model study of the proposed pump-intake and discharge flume : Florida Power Corporation's Crystal River Helper cooling-tower projectFri Mar 21 15:24:33 EDT 2014batch17376